Nueva asociación de vertebrados del Plioceno Tardío (Formación Las Cañas) en la provincia de Santiago del Estero

GRACIELA ESTEBAN; RODRIGO GONZÁLEZ; CLAUDIA HERRERA; CAROLINA MADOZZO; VANESSA TORRES CARRO; MATÍAS ARMELLA; SEBASTIÁN SABATER; NORMA NASIF; SERGIO M. GEORGIEFF

San Miguel de Tucumán

Congreso; XX Congreso Geológico Argentino; 2017

Asociación Geológica Argentina

The best known Neogene units of the northwestern Argentina (NWA) are located at the intermountain valleys of the region. Conversely, the Neogene levels from lowland areas, Chaco-Pampeana region, have been scarce studied. In this contribution we present a new fossil remain association from the Las Cañas Formation, increasing the mam- mal diversity of the NWA. The particular location of this outcrops, at the east of the Sierras Pampenas Norocciden- tales, allowing us to analyze the Pliocene lowland fauna. The record includes the first occurrence of the rodent Ca- viinae (Galea sp.); Xenarthra, Dasypodidae (Proeuphractus sp.); and notoungulates Hegetotheriidae (Tremacyllus incipiens) and Toxodontidae (Pisanodon; Dinotoxodon cf. D. paranensis). Due to the morphological singularity of specimens, added to geographical location of this outcrops, this preliminary study provides a starting points for future encompassing analysis into the biostratigraphy regional scheme.